1 ;;; mm-view.el --- Functions for viewing MIME objects
2 ;; Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
5 ;; This file is part of GNU Emacs.
7 ;; GNU Emacs is free software; you can redistribute it and/or modify
8 ;; it under the terms of the GNU General Public License as published by
9 ;; the Free Software Foundation; either version 2, or (at your option)
12 ;; GNU Emacs is distributed in the hope that it will be useful,
13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 ;; GNU General Public License for more details.
17 ;; You should have received a copy of the GNU General Public License
18 ;; along with GNU Emacs; see the file COPYING. If not, write to the
19 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 ;; Boston, MA 02111-1307, USA.
26 (eval-when-compile (require 'cl))
33 (autoload 'gnus-article-prepare-display "gnus-art")
34 (autoload 'vcard-parse-string "vcard")
35 (autoload 'vcard-format-string "vcard")
36 (autoload 'fill-flowed "flow-fill")
37 (unless (fboundp 'diff-mode)
38 (autoload 'diff-mode "diff-mode" "" t nil)))
41 ;;; Functions for displaying various formats inline
43 (defun mm-inline-image-emacs (handle)
44 (let ((b (point-marker))
47 (put-image (mm-get-image handle) b)
48 (mm-handle-set-undisplayer
50 `(lambda () (remove-images ,b (1+ ,b))))))
52 (defun mm-inline-image-xemacs (handle)
56 (annot (make-annotation (mm-get-image handle) nil 'text))
58 (mm-handle-set-undisplayer
61 (let (buffer-read-only)
62 (delete-annotation ,annot)
63 (delete-region ,(set-marker (make-marker) b)
64 ,(set-marker (make-marker) (point))))))
65 (set-extent-property annot 'mm t)
66 (set-extent-property annot 'duplicable t)))
69 (if (featurep 'xemacs)
70 (defalias 'mm-inline-image 'mm-inline-image-xemacs)
71 (defalias 'mm-inline-image 'mm-inline-image-emacs)))
73 (defvar mm-w3-setup nil)
81 (setq mm-w3-setup t)))
83 (defun mm-inline-text (handle)
84 (let ((type (mm-handle-media-subtype handle))
85 text buffer-read-only)
89 (setq text (mm-get-part handle))
91 (url-standalone-mode t)
93 (url-generic-parse-url (format "cid:%s" (mm-handle-id handle))))
94 (width (window-width))
95 (charset (mail-content-type-get
96 (mm-handle-type handle) 'charset)))
100 (narrow-to-region b (point))
101 (goto-char (point-min))
102 (if (or (and (boundp 'w3-meta-content-type-charset-regexp)
104 w3-meta-content-type-charset-regexp nil t))
105 (and (boundp 'w3-meta-charset-content-type-regexp)
107 w3-meta-charset-content-type-regexp nil t)))
109 (or (let ((bsubstr (buffer-substring-no-properties
112 (if (fboundp 'w3-coding-system-for-mime-charset)
113 (w3-coding-system-for-mime-charset bsubstr)
114 (mm-charset-to-coding-system bsubstr)))
116 (delete-region (point-min) (point-max))
117 (insert (mm-decode-string text charset))
118 (save-window-excursion
120 (let ((w3-strict-width width)
121 ;; Don't let w3 set the global version of
123 (fill-column fill-column)
124 (url-standalone-mode t))
126 (w3-region (point-min) (point-max))
128 (delete-region (point-min) (point-max))
130 (charset (mail-content-type-get
131 (mm-handle-type handle) 'charset)))
132 (if (or (eq charset 'gnus-decoded)
133 (eq mail-parse-charset 'gnus-decoded))
135 (narrow-to-region (point) (point))
136 (mm-insert-part handle)
137 (goto-char (point-max)))
138 (insert (mm-decode-string (mm-get-part handle)
141 "Error while rendering html; showing as text/plain"))))))
142 (mm-handle-set-undisplayer
145 (let (buffer-read-only)
146 (if (functionp 'remove-specifier)
147 (mapcar (lambda (prop)
149 (face-property 'default prop)
151 '(background background-pixmap foreground)))
152 (delete-region ,(point-min-marker)
153 ,(point-max-marker)))))))))
154 ((or (equal type "enriched")
155 (equal type "richtext"))
157 (mm-with-unibyte-buffer
158 (mm-insert-part handle)
159 (save-window-excursion
160 (enriched-decode (point-min) (point-max))
161 (setq text (buffer-string)))))
162 (mm-insert-inline handle text))
163 ((equal type "x-vcard")
168 (if (fboundp 'vcard-pretty-print)
169 (vcard-pretty-print (mm-get-part handle))
171 (vcard-parse-string (mm-get-part handle)
172 'vcard-standard-filter)))))))
175 (charset (mail-content-type-get
176 (mm-handle-type handle) 'charset)))
177 (if (or (eq charset 'gnus-decoded)
178 ;; This is probably not entirely correct, but
179 ;; makes rfc822 parts with embedded multiparts work.
180 (eq mail-parse-charset 'gnus-decoded))
182 (narrow-to-region (point) (point))
183 (mm-insert-part handle)
184 (goto-char (point-max)))
185 (insert (mm-decode-string (mm-get-part handle) charset)))
186 (when (and (equal type "plain")
187 (equal (cdr (assoc 'format (mm-handle-type handle)))
190 (narrow-to-region b (point))
193 (goto-char (point-max))))
195 (narrow-to-region b (point))
196 (set-text-properties (point-min) (point-max) nil)
197 (mm-handle-set-undisplayer
200 (let (buffer-read-only)
201 (delete-region ,(point-min-marker)
202 ,(point-max-marker)))))))))))
204 (defun mm-insert-inline (handle text)
205 "Insert TEXT inline from HANDLE."
208 (mm-handle-set-undisplayer
211 (let (buffer-read-only)
212 (delete-region ,(set-marker (make-marker) b)
213 ,(set-marker (make-marker) (point))))))))
215 (defun mm-inline-audio (handle)
216 (message "Not implemented"))
218 (defun mm-view-sound-file ()
219 (message "Not implemented"))
221 (defun mm-w3-prepare-buffer ()
223 (let ((url-standalone-mode t))
224 (w3-prepare-buffer)))
226 (defun mm-view-message ()
227 (mm-enable-multibyte)
229 (let (gnus-article-mime-handles)
230 ;; Double decode problem may happen. See mm-inline-message.
231 (run-hooks 'gnus-article-decode-hook)
232 (gnus-article-prepare-display)
233 (setq handles gnus-article-mime-handles))
235 (setq gnus-article-mime-handles
236 (mm-merge-handles gnus-article-mime-handles handles))))
238 (goto-char (point-min)))
240 (defun mm-inline-message (handle)
243 (charset (mail-content-type-get
244 (mm-handle-type handle) 'charset))
245 gnus-displaying-mime handles)
248 (setq charset (intern (downcase charset)))
249 (when (eq charset 'us-ascii)
253 (narrow-to-region b b)
254 (mm-insert-part handle)
255 (let (gnus-article-mime-handles
256 ;; disable prepare hook
257 gnus-article-prepare-hook
258 (gnus-newsgroup-charset
259 (or charset gnus-newsgroup-charset)))
260 (run-hooks 'gnus-article-decode-hook)
261 (gnus-article-prepare-display)
262 (setq handles gnus-article-mime-handles))
263 (goto-char (point-min))
266 (goto-char (point-max))
269 (insert "----------\n\n")
271 (setq gnus-article-mime-handles
272 (mm-merge-handles gnus-article-mime-handles handles)))
273 (mm-handle-set-undisplayer
276 (let (buffer-read-only)
277 (if (fboundp 'remove-specifier)
278 ;; This is only valid on XEmacs.
279 (mapcar (lambda (prop)
281 (face-property 'default prop) (current-buffer)))
282 '(background background-pixmap foreground)))
283 (delete-region ,(point-min-marker) ,(point-max-marker)))))))))
285 (defun mm-display-inline-fontify (handle mode)
287 ;; XEmacs @#$@ version of font-lock refuses to fully turn itself
288 ;; on for buffers whose name begins with " ". That's why we use
289 ;; save-current-buffer/get-buffer-create rather than
292 (set-buffer (generate-new-buffer "*fontification*"))
295 (buffer-disable-undo)
296 (mm-insert-part handle)
298 (let ((font-lock-verbose nil))
299 ;; I find font-lock a bit too verbose.
300 (font-lock-fontify-buffer))
301 ;; By default, XEmacs font-lock uses non-duplicable text
302 ;; properties. This code forces all the text properties
303 ;; to be copied along with the text.
304 (when (fboundp 'extent-list)
305 (map-extents (lambda (ext ignored)
306 (set-extent-property ext 'duplicable t)
308 nil nil nil nil nil 'text-prop))
309 (setq text (buffer-string)))
310 (kill-buffer (current-buffer))))
311 (mm-insert-inline handle text)))
313 ;; Shouldn't these functions check whether the user even wants to use
314 ;; font-lock? At least under XEmacs, this fontification is pretty
315 ;; much unconditional. Also, it would be nice to change for the size
316 ;; of the fontified region.
318 (defun mm-display-patch-inline (handle)
319 (mm-display-inline-fontify handle 'diff-mode))
321 (defun mm-display-elisp-inline (handle)
322 (mm-display-inline-fontify handle 'emacs-lisp-mode))
324 ;; id-signedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
325 ;; us(840) rsadsi(113549) pkcs(1) pkcs7(7) 2 }
326 (defvar mm-pkcs7-signed-magic
327 (mm-string-as-unibyte
329 (mapcar 'char-to-string
330 (list ?\x30 ?\x5c ?\x28 ?\x80 ?\x5c ?\x7c ?\x81 ?\x2e ?\x5c
331 ?\x7c ?\x82 ?\x2e ?\x2e ?\x5c ?\x7c ?\x83 ?\x2e ?\x2e
332 ?\x2e ?\x5c ?\x29 ?\x06 ?\x09 ?\x5c ?\x2a ?\x86 ?\x48
333 ?\x86 ?\xf7 ?\x0d ?\x01 ?\x07 ?\x02)))))
335 ;; id-envelopedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
336 ;; us(840) rsadsi(113549) pkcs(1) pkcs7(7) 3 }
337 (defvar mm-pkcs7-enveloped-magic
338 (mm-string-as-unibyte
340 (mapcar 'char-to-string
341 (list ?\x30 ?\x5c ?\x28 ?\x80 ?\x5c ?\x7c ?\x81 ?\x2e ?\x5c
342 ?\x7c ?\x82 ?\x2e ?\x2e ?\x5c ?\x7c ?\x83 ?\x2e ?\x2e
343 ?\x2e ?\x5c ?\x29 ?\x06 ?\x09 ?\x5c ?\x2a ?\x86 ?\x48
344 ?\x86 ?\xf7 ?\x0d ?\x01 ?\x07 ?\x03)))))
346 (defun mm-view-pkcs7-get-type (handle)
347 (mm-with-unibyte-buffer
348 (mm-insert-part handle)
349 (cond ((looking-at mm-pkcs7-enveloped-magic)
351 ((looking-at mm-pkcs7-signed-magic)
354 (error "Could not identify PKCS#7 type")))))
356 (defun mm-view-pkcs7 (handle)
357 (case (mm-view-pkcs7-get-type handle)
358 (enveloped (mm-view-pkcs7-decrypt handle))
359 (otherwise (error "Unknown or unimplemented PKCS#7 type"))))
361 (defun mm-view-pkcs7-decrypt (handle)
362 (insert-buffer (mm-handle-buffer handle))
363 (goto-char (point-min))
364 (insert "MIME-Version: 1.0\n")
365 (mm-insert-headers "application/pkcs7-mime" "base64" "smime.p7m")
366 (smime-decrypt-region
367 (point-min) (point-max)
368 (if (= (length smime-keys) 1)
370 (smime-get-key-by-email
371 (completing-read "Decrypt this part with which key? "
373 (and (listp (car-safe smime-keys))
374 (caar smime-keys)))))))
378 ;;; mm-view.el ends here